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Questions tagged [boot]

Use this tag if you have trouble booting Ubuntu or you have questions about the bootup process.

Boot is a process of starting a computer system. Consider using the boot info script when asking your question:

24093 questions
535
votes
33 answers

My computer boots to a black screen, what options do I have to fix it?

I am trying to boot Ubuntu on my computer. When I boot Ubuntu, it boots to a black screen. How can I fix this? Table of Contents: If you are trying to install Ubuntu If you have a dual boot system If an update or something else caused your…
Jorge Castro
  • 71,754
48
votes
8 answers

How to fix very slow Ubuntu booting?

When I boot up my my newly installed copy of Ubuntu on my custom rig w/4GB DDR3 RAM and a 3 Ghz Intel Core i7, it takes about a minute and a half at the purple loading screen, and then after logging in it takes a while for the icons to show up on…
Neal
  • 887
41
votes
5 answers

Getting back Ubuntu's default boot splash

I am a Gnome user. Just out of curiosity, I installed the package kubuntu-desktop to check out the latest KDE. The package has hijacked and replaced the nice ubuntu boot splash with the blue KDE one. How can I get the original boot splash back ?…
letronje
  • 755
35
votes
11 answers

Stuck at GRUB command line

This is what I see: GNU GRUB version 2.02~beta2-9ubuntu1 Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file completions. grub> _ What should I…
Khivraj Rathore
  • 359
30
votes
1 answer

How to fix "EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro"

I saw this in the system log: EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro. What is the meaning of this error? How to fix it? Relevant output: $ dmesg | grep mount [ 1.515956] EXT4-fs (sda1): mounted filesystem with ordered data mode.…
Ionică Bizău
  • 9,503
30
votes
6 answers

Gave up waiting for root device on Ubuntu

I've just installed Ubuntu 12.10 to dual boot with Windows 8, but every time I choose Ubuntu from grub menu, it always get stuck at this error and won't boot: Gave up waiting for root device. Common problems: - Boot args (cat /proc/cmdline) -…
winter_wind
  • 301
24
votes
3 answers

What does the "kvm disabled by bios" message during the boot process mean?

I get this message during booting of my laptop: [14.255596] kvm disabled by bios Can someone explain this?
rahul kumar
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21
votes
18 answers

Disk by UUID not detected (initramfs), boot failure

I am unable to boot Ubuntu 10.04, with the built in boot shell giving out this error: Gave up waiting for root device. Common problems: — Boot args (cat /proc/cmdline) — Check rootdelay= (did the system wait long enough?) — Check root=…
crodjer
  • 855
20
votes
5 answers

Stuck in emergency mode and nothing works?

Whenever I try to boot my Linux, it goes into emergency mode, saying You are in emergency mode. After logging in, type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl default" or ^D to try again to boot into…
Ukula Udan
  • 303
19
votes
4 answers

Boot time is super fast, how come?

The boot time in Ubuntu is really fast. 7-10 seconds. Comparing it to my mac (which is about 30-40 seconds). How come Ubuntu is so much faster? I'm thinking that it uses a different kernel (Linux). I'm not sure if that would come into account…
alexyorke
  • 3,589
19
votes
4 answers

SGX disabled by BIOS message on Ubuntu 20.04 booting

A few days ago I realize that the following message appears when booting Ubuntu 20.04 (it didn't appear before): [ 0.113770] x86/cpu: SGX disable by BIOS. After a little research I found other people having this "problem". On the cases I saw the…
Ruisu Migeru
  • 193
18
votes
2 answers

How to set up a loop device at boot time?

I want to set up a loop device at boot time. I wonder what is the best way to do this. I've searched for it on google. Some says adding a udev rule, some says putting a scripts in /etc/init.d, some even modifies the initramfs. So what is the best…
Roun
  • 283
18
votes
15 answers

Not booting from USB or CD (SYSLINUX Message)

I am trying to install linux on my laptop, a Toshiba Satellite C6550-S5200. I did it once but something happened so I removed it then I had to destroy all data on hard drive so now I have nothing on it. Well I got a iso file burned to a CD and to a…
Raymond
  • 181
16
votes
6 answers

"Gave Up waiting for root device. Alert! /dev/disk/by-uuid/ does not exist. Dropping to a shell" while booting

I used Ubuntu some years back and gave up on it. I am now ready to try again. To my surprise I was welcomed with this message as soon as I did the first install. If I waited some time and typed exit the OS would boot normally. I decided to…
Inti Garcia
  • 161
14
votes
2 answers

Can I disable the Ubuntu splashscreen?

I wanted to know if it is possible to disable the splashscreen at boot. The one where is says Ubuntu and it has the orange dots moving. I want to remove that and be able to see the commands like what you can see when it shuts down like stopping…
user49191
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